[Bug tree-optimization/103194] [12 Regression] ice in optimize_atomic_bit_test_and with __sync_fetch_and_and since r12-5102-gfb161782545224f5

[crazylht at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103194

Hongtao.liu <crazylht at gmail dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |jakub at gcc dot gnu.org

--- Comment #8 from Hongtao.liu <crazylht at gmail dot com> ---
unsigned long pscc_a_2_3;
int pscc_a_1_4;
unsigned long pc2;
void pscc(int n)
{
  long mask = 1ll << n;
  pc2 = __sync_fetch_and_or(&pscc_a_2_3, mask) & mask;
}

void pscc1(int n)
{
  long mask = 1ll << 65;
  pc2 = __sync_fetch_and_or(&pscc_a_2_3, mask) & mask;
}

pscc and pscc1 have different behavior when n >= 64, It seems unsafe to
optimize variable mask?